My wife has affair with a person of her past life before marriage

I have a doubt on my wife that why she is always misbehaving with everyone when my family members and me is giving her lots of love. So, I pulled out the call details from the operator and found that everyday she is talking to that person. At that time she was in her mother's house from last two months because she was doing her MBA from there itself.

When I went there to bring her back to my home. That time in front of her parents and my parents I asked her who is that person she is talking to everybody. But she denied, after asking her so much about him that I have all the proofs then she confessed. That she is only talking to her from last two months. And I brought her back to my home.

Now I found that she has affair with him earlier to our marriage.

Now, she again went to her mother's house without my permission and blaming me that I misbehaved with her in bed. My in laws are asking me to come to their home alone.

So any suggestions how to handle this situation.

Thanks